How popular is Bernadine?

Bernadine is a very popular first name for women (#725 out of 4276, Top 17%) but a unique surname for both adults and children. (2000 U.S. Demographics)

Bernadine reached its peak rank of #287 in the U.S. during the years 1920-1929, but is not ranked currently. (2015 U.S. SSA Records)

Which version is better?

with its variant forms and related girl names. Bernadette(#1492 via latest list), Bernie and Bernard are the prominent variation forms of Bernadine listed in the Top 2000. These forms of Bernadine were favored as birth names 95 years ago (average #987) and are now significantly less popular, with versions such as Bernadette falling out of fashion.